Door closer and check.



P. A. RICHMOND.

DOOR CLOSER AND CHECK.

APPLICATION FILED FEB. 28, 1914.

1 1 1 4, 1 84:. Patented 001;. 20, 1914.

THE NORRIS PETERS C0 FHOTO-LITHO.. WASHINGTON. D C.

P. A. RICHMOND. DOOR CLOSER AND CHECK. APPLICATION FILED FEB. 28, 1914.

1 1 1 1, 1 84. Patented Oct. 20, 1914.

3 SHEETS-SHEET 2.

7HF NORR/S PETERS all, PHOTO urn- WA$H!NU /'UN. I) 4' P. A. RICHMOND, 0000 CLOSER AND CHECK.

IIIIIIIIIIIIIIIII EB. 28, 1914. 1, l 14, 1 84. Patented 001:. 20, 1914.

3 EEEEEEEEEEEE 3.

mum-g mmill I; w I HNUIIIIIIIIH lllllllllll Ill-I null lm MINIMUM"! PERCY AUGUs'rINn RICHMoNnoF WASHINGTON, DISTRICT or COLUMBIA,

noon CLOSER AND: CHECK.

. To all whom it may concern:

Be it known that I, PERCY AUGUSTINE RICHMOND, a citizen of the United States,

residing at Washington, 'in the Districtof Columbia, have invented certain new and useful Improvements in Door Closers and Checks; and I do hereby declare the followingto be a full, clear, andexact description of the invention, such as will enable others skilled in the art to which it appertainsto:

make and use the same.

My invention relates to improvements in door closers and checks and has for its object, to provide a device of this character which will be of simple and durable construction, cheap to manufacture and more proeflicient in action than those heretofore posed. 1

A further obj ect of my invention is to 'provide a door check in which the danger of leakage is reduced to a minimum and in which the tension of the Closing spring may be regulated to suit the operating conditions. With these and other objects in view my invention consists in the novel details of construction and combinations of parts more fully hereinafter described and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification'in which like numerals designate like parts in all the views :Figure l'is a side elevational view of my improved check; Fig. 2 'isa top plan view of Fig. 1; Fig. 3 is acentral vertical sectional view taken on the line 33 of Fig.

2, and looking in the direction of the ar-v rows; Fig. 4 is a horizontal sectional view taken on the line H of Fig. 1, and look ng down; Fig. 5 1s a vertical cross sectional View taken on the line 5-5 of Fig. 4, and

looking in the directionof the arrows; Fig- L p ton 23 and the wall 3 and. surroundmg the piston andcrank rods 28,and 31 is, a sp ral 6 is a detailperspective view of the crank member employed; and Fig. 7 is a detail perspective view of the means I prefer to employ for securing the operating arm to the crank member.

1 designates a casing which may conven iently take the form of a casting, provided I Specificationof Letters Patent Pat en Application filed February 28, 1914. serial No. 821,713." I

circular portions of the crank member 4 are all ground to a sliding .fit for a purpose to be hereafter disclosed. The bore 2 is further screw threaded at each end to receive;

theoaps .14 and 15 which ,are bored and ground to accurately fit over and around the reduced portions S, 9,10, and 11 and the squared end 13 of the crank member 4.

.This accurate fitting of the caps over and around the reduced portions of the crank member 4 provides a tortuous course through which it is practically impossible for the comparatively heavy oil employed to findits way; i I

, Fitting the squared end 12 ofthecrank member 4 is one'end of the operating arm 16 which is pivoted at its other end as at 17tothe rod 18 which is connected by the adjusting'nut 19 to the rod 20. The rod 20 is at-. tached through the universal joint 21 to the doorfacing orvother stationary member:22, as is well known. I i Snugly fitting the horizontal bore 3 is the,

piston 23 provided with the usual ball valve '24 held in place by the retaining member 25. The piston 23 is also provided with twoor more recesses 26 for a purpose to be more fully disclosed below. Connected tothe inner face ofthe piston 23 as by a universal joint 27 is a piston rod 28 provided atone end with a reduced screwthreaded portion "29 adapted to engage with the threaded hole Said crank rod-31 is loosely attached to theconnecting pin 7 of 30 of a Crank rod 31.

the crank member 4 by means of a strap 32 secured, thereto by rivets 33. V

The bores 2 and 3 are so :formed, as to leave a-wall 34 between them and said wall is provided with a slot .35 connecting. said bores to permit the passage of the crank rod 31, aswill be clear from the drawings." 3 Fittingwithin the bore 3 betweenthe pis spring 36. This springfmay be of any itlespring made-from material having. rectan -i gular cross sectlon, as'showmso thatJshould the spring break after long continued vuse,

the fiat faces of the broken coils will rest. against-one another and obviate, the'necessity of in n e'diately replacing the spring.

The boref3 is .screw threaded at its outer,

.end and provided-with a cap 37 as shown. a

Integral with the c'asing 1 are the flanges sired','construction, but "I' prefer. to use' a screw as shown, or in any other suitable 38 and 39 provided with the usual screw holes whereby the check may be attached to the door. q

It has been found desirable in this type of check to provide for the admission of air to the horizontal bore 3 in order that.

the piston 23 may operate with greater smoothness, Theoretically as the said piston moves from one end to the other of the bore 8, the oil or other fluid will be transferred from one side of the piston to the other through the ball valve 24. It sometimes happens in practice, however, that the ball 24 so positions itself over the mouth of the passage through the piston 23 as to prevent the oil from flowing through said passage, for a time at least, and thereby causes a partial vacuum on one side of said piston. The above is especially true upon the return stroke of the piston, or during the eX- pansion of the spring 36, and causes the door to close with an uneven, jerky movement. In order to overcome this action I provide an air passage 40 communicating at one end by means of a perpendicular passage with the bore 8 and having at its other end a stuffing box 41. Loosely passing through said stufling box and air passage is a valve rod 42 screw threaded at its inner end, as at 50, in the casing 1. Said rod 42 fits the stuffing box loosely enough to admit air slowly to the passage 40 but at the same time the packing in said box fits said rod snugly enough to prevent any of the heavy oil employed in the bore 8 from leaking out. The rod 42 is adjusted in or out by turning the same, its screw threaded end 50 opening and partially or totally closing the perpendicular passage leading to the bore 3 and thereby controlling the amount of air admitted to said bore.

At 44 I have provided an opening for introducing oil or other fluid such as is commonly used in this type of check, said opening being conveniently closed by means of a screw 45, as shown, or in any other manner desired.

I have further provided a simple and effective means for insuring the correct positioning of the operating arm 16 upon the squared end 12 of the crank member 4. This means best shown in Fig. 7, comprises an L-shaped member 46 recessed into the arm 16 and provided with a toe 47 adapted to engage a hole 48 provided in the correct face of the squared ends 12 and 13 of the crank .member 4. This L-shaped member 46 is secured to the arm 16 by means of the manner. It will thus be seen that there is only one position which the arm 16 can assume in relation to the crank member 4 and as this will be determined by the manufacturer it will be impossible to adjust my check improperly when attaching to the door.

Should it be necessary or desirable to adjust the tension of the spring 36, it may be readily accomplished by removing the cap 37 and inserting a spanner wrench in the holes 26 in the piston 23, whereupon a few turns to either the right or left will,

through the threaded connection between I the piston and crank rods, cause more or less tension to be placed upon said spring as desired.

I have shown my check as being applied to right-handed door but should it be desired to use it with a left-handed door the change can be easily made by detaching the arm 16 from the squared end 12, removing the caps 14 and 15, reversin the casing 1, replacing the caps in reversed positions and attaching the arm 16 to the squared end 13,

as will be clear.

ber 4 comparatively large, by grinding them to a sliding fit and by placing the caps 14, 15 and 37 in their proper places, I have produced a check in which the possibility of leakage of the fluid employed is reduced to minimum if not entirely obviated.

It is obvious that those skilled in the art may vary the details of construction as well as the arrangement of parts without departing from the spirit of my invention and I therefore do not wish to be limited to the above disclosure except as may be required by the claims.

What I claim is v 1. In a door check the combination of a casing provided with a vertical and a horizontal bore; a crank member provided with a plurality of enlarged bearing surfaces and a plurality of successively reduced portions, said enlarged bearing surfaces snugly fitting said vertical bore; a piston fitting said horizontal bore; a valve in said piston; a springmounted in said horizontal bore and coacting with said piston; a piston rod con necting said piston and crank member; and caps provided with shoulders snugly fitting said reduced portions and closing the ends 2. In a door check the combination of a casingprovided with a vertical and a hori-. v

zontal bore; a crank member provided with' a plurality of enlarged bearing surfaces and a plurality of successively reduced portions,

said enlarged bearing surfaces snugly fitting said vertical bore; a piston fitting said horizontal bore; a valve in said piston; a spring mounted in said horizontal bore and coacting with said. piston; an adjustable valve for admitting air to said horizontal bore an adjustable connection, lying wholly In testimony whereof, I aflix my signaturein the presence of two Witnesses.

PERCY AUGUSTINE RICHMOND.

Within said casing, between said piston and crank member whereby the tension of said spring may be controlled; and caps provlded with shoulders snugly fittin said reduced portions and closing the en s of said vertical bore whereby the leakage of oil is prevented, substantially as described.

'Witnesses:

HILDA RICHMOND, ROLEN E. PAINTER.

Copies of thispatent may be obtained for five cents each, by addressing the Commissioner of Patents- Washington, D. G. 

